CORRECTING and REPLACING Interactive Brokers Group Reports Brokerage Metrics For October 2009 and Announces Upcoming Presentation

GREENWICH, Conn.--(Business Wire)--
First paragraph, first sentence of release should read: Interactive Brokers
Group, Inc. (NASDAQ GS: IBKR) an automated global electronic market maker and
broker, today reported its Electronic Brokerage monthly performance metrics for
October... (instead of ...monthly performance metrics for September...).

The corrected release reads:

INTERACTIVE BROKERS GROUP REPORTS BROKERAGE METRICS FOR OCTOBER 2009 AND
ANNOUNCES UPCOMING PRESENTATION

Interactive Brokers Group, Inc. (NASDAQ GS: IBKR) an automated global electronic
market maker and broker, today reported its Electronic Brokerage monthly
performance metrics for October and announced that Chairman and Chief Executive
Officer Thomas Peterffy will present at the Keefe, Bruyette & Woods 2009
Securities Brokerage and Market Structure Conference on Thursday, November 5,
2009 at 11:15 a.m. EST.

Highlights for the month included:

* Ending customer equity of $14.1 billion, 58% higher than October 2008 and 5%
higher than prior month.
* Ending customer credit balances of $10.1 billion and customer margin loan
balances of $3.0 billion.
* 330 thousand Daily Average Revenue Trades (DARTs) in October 2009, up 2% from
prior month.
* 645 annualized average cleared DARTs per customer account.
* 129.8 thousand customer accounts, 19% higher than October 2008 and 2% higher
than prior month.

More information, including historical results for each of the above metrics,
can be found on the investor relations page of the Company`s corporate web site,
www.interactivebrokers.com/ir.

Mr. Peterffy's presentation can be heard live via webcast on the Internet
accessible from the company's web site, www.interactivebrokers.com/ir.
Participants should log in approximately 10 minutes prior to the start of the
presentation. A replay will also be available on the company's website.

About Interactive Brokers Group, Inc.:

Interactive Brokers Group Inc., together with its subsidiaries, is an automated
global electronic market maker and broker specializing in routing orders and
executing and processing trades in securities, futures and foreign exchange
instruments on more than 80 electronic exchanges and trading venues around the
world. As a market maker, we provide liquidity at these marketplaces and, as a
broker, we provide professional traders and investors with electronic access to
stocks, options, futures, forex, bonds and mutual funds from a single IB
Universal AccountSM. Employing proprietary software on a global communications
network, Interactive Brokers Group continuously integrates its software with a
growing number of exchanges and trading venues into one automatically
functioning, computerized platform that requires minimal human intervention.

Cautionary Note Regarding Forward-Looking Statements:

The foregoing information contains certain forward-looking statements that
reflect the company's current views with respect to certain current and future
events and financial performance. These forward-looking statements are and will
be, as the case may be, subject to many risks, uncertainties and factors
relating to the company's operations and business environment which may cause
the company's actual results to be materially different from any future results,
expressed or implied, in these forward-looking statements. Any forward-looking
statements in this release are based upon information available to the company
on the date of this release. The company does not undertake to publicly update
or revise its forward-looking statements even if experience or future changes
make it clear that any statements expressed or implied therein will not be
realized. Additional information on risk factors that could potentially affect
the company's financial results may be found in the company's filings with the
Securities and Exchange Commission.

For Interactive Brokers Group, Inc.
Media:
Andrew Wilkinson, 203-913-1369
or
Investors:
Deborah Liston, 203-618-4070

Copyright Business Wire 2009